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A075441 a(n) is the number of solutions to the n-term Znam's problem. 1
0, 0, 0, 2, 5, 18, 96 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,4

COMMENTS

Three results are missing for a(7) in Eric Weisstein's World of Mathematics, they're [2, 3, 7, 43, 3263, 4051, 2558951] [2, 3, 11, 25, 29, 1097, 2753] [2, 3, 13, 25, 29, 67, 2981] [From Du, Zhao Hui, Jan 24 2010]

LINKS

Table of n, a(n) for n=2..8.

Eric Weisstein's World of Mathematics, Znam's Problem

all results for a(8) [From Du, Zhao Hui, Jan 24 2010]

CROSSREFS

Cf. A075461.

Sequence in context: A217389 A123310 A058119 * A187008 A075634 A007127

Adjacent sequences:  A075438 A075439 A075440 * A075442 A075443 A075444

KEYWORD

nonn,more,hard

AUTHOR

Eric W. Weisstein, Sep 16, 2002

EXTENSIONS

Corrected a(7)-a(8) by Du, Zhao Hui, Jan 24 2010

STATUS

approved

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Last modified April 18 18:46 EDT 2014. Contains 240732 sequences.